Impact Sensor: Description and Operation

AIRBAG SENSOR
The airbag control module and side airbag sensor contain an electric sensor and a safety sensor.

The electric sensor consists of a semiconductor type sensor which senses the deceleration caused by collision in terms of change in the electrical resistance of the impact sensing circuit.

The safety sensor is a pendulum type sensor. If the sensor receives a frontal or side impact exceeding a certain limit, the mass in the sensor move in the direction opposite to the impact direction to turn the switch ON.